Furnace arch for boilers



Jan. 30, 1923.. 1,443,487. M. LIPTAK.

FURNACE ARCH FOR BOILERS.

FlLED JAN. 20, I9l9- 3 SHEETSSHEET 1.

' 971/57? for fllckael Zlfi iait 23;, Ink 1 71101216915 Jan. 80, 1923.

M. LIPTAK.

FURNACE ARCH FOR BOILERS.

3 SHEETS-SHEET 2.

FILED JAN-20,1919.

Jan. 30, 1923. 1,443,487. M. LIPTAK.

FURNACE ARCH FOR BOILERS.

' FILED JAN. 20, 1919. s SHEAETSSHEET a.

Patented Jan. 30, 192 3..

UNITED STATES 1,443,487 PATENT OFFICE.

MICHAEL LIPTAK, OF ST. PAUL, MINNESOTA, ASSIGNOR TO LIP'IAK FIRE BRICK ARCH CO., OF MINNEAPOLIS, MINNESOTA, A CORPORATION OF MINNESOTA.

FURNACE ARCH FOR BOILERS.

Application filed January 20, 1919. Serial No. 272,116.

To all whom it may concern:

Be it known that 1. MICHAEL LirTAK, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements in Furnace Arches for Boilers; and I do hereby declare the followin to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to furnace arches for the fire boxes of boilers and furnaces and is in the nature of an improvement on or refinement of the construction disclosed and broadly claimed in my prior Patents No. 1,326,752 and No. 1,326,753, both issued of date December 30, 1919, and entitled Furnace arch for boilers.

The invention is illustrated in the accompanying drawings wherein like characters indicate like parts throughout the several views. Referring to the drawings;

Fig. 1 shows one-half of the arch partly in rear elevation and partly in transverse vertical section with some parts that are at the rear of the section line shown in full;

Fig. 2 is a fragmentary view in perspective looking downward at the arch;

Fig. 3 is a perspective'view looking at the arch from a point below the bottom thereof and showing both the rear wall and bottom formation;

Fig. 4 is a perspective view of one of the hanger blocks;

Fig. 5 is a perspective view of one of the underfacing blocks;

Fig. 6. is a perspective view of one of the supplemental underfacing blocks;

Fig. 7 is a perspective view of one of the main corner blocks;

Fig. 8 is a perspective view of one of the supplemental corner blocks;

Fig. 9 is a perspective view of one of the filler blocks; y

Fig. 10 is a perspective view of one of the crown blocks;

Fig. 11 is a fragmentary view in rear elevation illustrating a modified arrangement of the hanger and underfacing blocks; and

Fig. 12 is a section on the line 12--12 of Fig. 11.

Fig. 13 is a longitudinal section of a furmace and of a modified form of my improved arch applied thereto.

The preferred construction illustrated in Figs. 1 to 9, inclusive, will first be described.

The customary masonry walls ofthe furnace are indlcated by the numeral .11. The fur nace arch is hung from the customary transverse main arch beams 12, the ends of which are embedded in the masonry walls. A multiplicity of laterally spaced supplemental beams 13 are hung from the lower flanges of the main beams, preferably by beamhangers 14 of a type disclosed and claimed in my pending application S. N. 240,292 which hangers have upper flanges that embrace the lower flanges of the main beams and have lower flanges that embrace upper flanges 15 on the rear or inner ends of said supplemental beams. At their rear end extremities, the supplemental beams 13 are provided in line with their upper flanges 15 with rigidly secured and preferably integrally cast sockets 16 that are formed with T-shaped longitudinal channels open at the underside.

T-shaped channels of the sockets 16 are adapted to receive and interlock with the upper flanges of detachable beam tips 17. Preferably, the beam tips 17, in their main cross section, are of approximately the same form as the inner portions of the supplemental beams 13, but portions of the upper flanges and portions of the webs of said beams are omitted and the projecting ends are formed with late-rally projecting horizontal crown plates 18 that directly sup-port crown blocks 19 on which latter the apron wall 20 is built. This construction, however, is disclosed and claimed in my pending application S. N. 259,026, filed October 21, 1918, andentitled Furnace arch.

The arch proper is made up of interlocking and replaceable blocks of the general character disclosed and broadly claimed in my pending application 216,152, but are of what I believe to be a much improved arrangement.- As preferably now constructed, this arch is made up of blocks that may, because of their functions, be distinguished as the hanger blocks, the main and supplemental underfacing blocks, the main and supplemental corner blocks and the filler blocks. The hanger blocks form the upper layer and are directly hung from the laterally spaced or supplemental beams. The said hanger blocks 21 are app oximately T- shaped in cross section wit wide upper flanges that rest on the lower flanges of the beams 13 and with relatively narrow lower flanges that detachably support the so-called main underfacing blocks. The hanger blocks 21 at the extreme sides, are half sections of the blocks 21 and are partly embedded in the masonry wall l1.

The main underfacing blocks 22, with ;respect to the supplemental underfac ng blocks 23, are relatively deep in a vertical direction. The said main underfacing blocks 22 fit loosely between the lower por-. tions of adjacent hanger blocks 21 and they have upper edge flanges 22 that rest upon the lower flanges 21' of the hanger blocks 21. At points considerably below the lower portions of the hanger blocks 21, the main underfacing'blocksg22 are provided on each side with outstanding ribs 22.

The supplemental underfacing blocks 23 fit between the main underfacing blocks 22 and, in their sides, they have grooves that fit the ribs 22 and just above said grooves, at their extreme upper portions, 'they'are formed with flanges 23 that rest upon the said ribs 22". The upper surfaces of the main blocks 22 are spaced from the lower portions of the beam 13 and theupper portions of the su plemental blocks 23 are spaced from theower portions of the overlying hanger b1ocks'2-1, so as to afford heat insulating air spaces that reduce to a minimum, the conduction of heat through the arch,

. The main corner blocks 24 have the same general cross section as the main underfacing blocks 22, so that they may be. interlocked to and detachably hung from the overlying hangerblocks; but the rear face of said blocks 24 are rounded or curved downwardly and forwardly, as best shown inFig.2.

. The supplemental corner blocks 25 have the same general cross section as the supplemental underfacing blocks 23 so that they may be detachably hung from the main corner blocks. 24 and in part also from the horizontally adjacent main underfacing blocks 22. Here it is important to note that the said .supplemental corner blocks 25, while, vertically, of much less depth than the main corner blocks 24, are, in a longi- .tudinal horizontal direction, considerably longer than the main corner blockso that when hung on adjacent main cornerblocks they; are extended rearward and interlock with certain of the main underfacing blocks 22, thereby form ng lapped joints therewith. Also, it will be noted that because of the varying lengths of the main and supplemental corner blocks, and because of the same length as between the main and supplemental underfacing blocks, all of the underfacing blocks'are caused to break 01' lap joints, as best shown in Fig. '3.

The ribs on the sides of the main corner blocks 24 that correspond to the ribs 22 on the sides of the main underfacing blocks 22 are indicated at 24, and the upper flanges of said main corner blocksthat correspond to [the upper flanges 22 of said blocks 22 are indicated at 24". The flanges on the upper portions of the supplemental corner blocks 22, that rest upon the ribs 24 and correspond to, and align with the flanges 23 of the supplemental under facing blocks 23, are indicated at 25*. Pref erably, the hanger blocks 21 are formed with flat front and rear ends, but the main under facing blocks 22, supplemental underfacing blocks 23, main corner blocks 24 and supplemental corner blocks 25, at abutting ends, are formed with ofi'set upper and lower portions and intermediate shoulders 22, 23, 24 and 25', respectively. These offset portions and shoulders cause the abutting members of the said blocks, at their end joints to over and underlap each other, and this no't only breaks the joint vertically, but produces an interlocking between thelongitudinallyadjacent blocks, and this interlocking greatly assists in preventing a badly damaged block from falling from the arch. Moreover, the interlapping of the corner blocks and underfacing blocks not only produces. the offset or broken joints above noted, but produces aninterlocking, not only between over and underhanging blocks but also between longitudinally aldjacent blocks. For example, a supplemental corner block 25' is not only interlocked to .and hung from the laterally adjacent main badly-damaged, should be held in position to protect the hanger blocks and the metallic beam structures.

With the above described lapping of blocks, the rear or innermost of the hanger blocks 21 will be forward of the inner or rear faces of the corner blocks 24, thereby leaving intervening spaces, and to fill these spaces, I employ approximately T-shaped filler blocks 26. To permit these filler blocks to be inserted into the said spaces fiushor approximately flush'with the rear face of the corner blocks 24 and 25, portions of the upper flanges 24 of the main corner blocks 24' are cut away flush with the neck or sides of said blocks, as shown at 24, (see Figs. 2 and 7).

tion, the supplemental corner blocks 25 and the supplemental underfacing blocks 23 may be slid and replaced without disturbing the main corner blocks or main underfacing blocks. Also, of course, the filler blocks 26 ma be removed and replaced without distur ing any of the other blocks. The main corner blocks and main underfacing blocks ma also be slid and removed and replaced without disturbing the hanger blocks and the hanger blocks, themselves, when necessary, may be slid from the laterally spaced beams-and replaced without disturbing the said beams or the apron wall, which latter is supported by the' beam tips and the socalled crown plates above the plane of the upper surfaces of the said hanger blocks.

It is also important to note that the interlockingengagement between the main and supplemental underfacing blocks and between the main and suplemental corner blocks is high up or far above the undersurface of the arch, so that even when large portions of the under blocks are cracked off or burned away, the interlocking engagement between the said blocks will still be maintained.

In the modified construction illustrated in Fig. 11, the main underfacing blocks 27 are displaceably interlocked to the hanger blocks 21, as already described, but are not extended to the bottom of the arch. Their intermediate ribs are dispensed with and they are formed at their lower edges with outstanding flanges 27. The supplemental underfacing blocks 28 have portions that fit between the depending portions of the blocks 27 and are provided with upper flanges 28=Ethat rest on the flanges 27 of the blocks 27; and the lower portions of said supplemental blocks 28 are made of such width that the assembled blocks 28 approximately meet midway under the blocks 27. In this arrangement, the undersurfaces of the blocks 28 alone are directly exposed to the action of the flames. In both of the arrangements illustrated, the supplemental blocks are either directly or indirectly and detachably hung from the hanger blocks.

In the construction illustrated, in Figs. 11 and 12, upper corner blocks 28 are slipped onto the upper flanges of the blocks 27 and lower corner blocks 28 are slipped onto the lower flanges of the blocks 27.

It is evident that the above described plan of detachably interlocking the blocks makes it possible to construct an arch with any desired number of layers.

What I claim is:

1. A furnace arch comprising hanger blocks supported in an upper layer, laterally spaced main underfacing blocks detachably hung from said hanger blocks, and supplemental underfacin blocks interposed between and detachably ung directly from the depending portions of said main underfacin blocks. I

2. furnace arch comprising hanger blocks supported in an upper layer, laterally s aced main underfacing blocks detachab y hung from said hanger blocks, and supplemental underfacing blocks interposed between and detachably hung directly from the depending portions of said main underfacing blocks, the said main and supplemental underfacing blocks being removable and replaceable by approximately horizontal sliding movements.

3. In a furnace arch, the combination with laterally spaced flanged beams, of hanger blocks slidably and detachably interlocked to said beams and having depending portions flanged on both sides, main underfacing blocks having their upper portions interposed between the depending portions of said hanger blocks and flanged for interlocking and sliding detachable engagement with said hanger blocks, and supplemental underfacing blocks interposed between the depending portions of said main underfacing blocks, the said main and supplemental blocks having interlocking flanges and grooves for supporting said supplemental blocks from said main blocks and permitting the latter to be detached and replaced by ap proximately horizontal sliding movements.

4. A furnace, arch comprising hanger blocks supported in an upper layer, laterally spaced main underfacing blocks detachably hung from said hanger blocks, and supplemental underfacin blocks interposed between and detacha ly hung directly from the depending portions of said main under facing blocks, there being air spaces between the bottoms of said hanger blocks and the tops of said supplemental blocks.

5. In a furnace arch, the combination hanger blocks slidably and detachably interlocked to said beams and having depending portions flanged on both sides, main underfacing blocks having their upper portions interposed between the depending portions of said hanger blocks and flanged for interlocking and sliding detachable engagement with said hanger blocks, and supplemental underfacing blocks interposed between the depending portions of. said main underfacing blocks, the said main and supplemental blocks having interlocking flanges and grooves for supporting said supplemental blocks from said main blocks and permitting the latter to be detached and replaced by approximately horizontal sliding movements there being air spaces between the tops of said main underfacing blocks and the bottoms of said beams and also air spaces between the-tops of said supplemental blocks and the bottom of said hanger blocks.

I ably hung '-talcorner vtachably' hung; respectively, on said main underfacing and corner blocks, said; main cornerv blocks being relativelyshort. and as compared with said sup:

"blocks, supported injan upper layer, laterv detachablv hung -'from i ally s tachably supplemental underfacing blocks and: suplateral plemental corner blocks interposedbetwe'en and detachably hung, respectively, on said main underfacing-andfcorner blocks. f

7. A furnace. arch ='com prising hangerblocks supported in an upper 1a er, latert iaced main under-facing b o'cks, and-f =supp'lemental under-facing blocks and sup- 'plenie'ntal corner blocks interposed between and1detachably hung, respectively, on said,

and corner blocks, the

ally s lateraylly spaced main corner blocks detachblocks interposedbetween and derelatively .deep

plemental corner blocks, and said' main and.

' supplemental underfacing blocks being of substantially-thesame length whereby thc detaehably hung, respectively, on saidmain said blocks are connected with lapjoints.

8.- A furnace arch comprising hanger bllocks supported in an upper layer; latera laterally spaced main corner blocks detach-i -ably hung from said hanger blocks, supple- 'mental underfacing blocks and supplemental corner blocks interposed between and.

ly spaced main junderfacing blocks and 6. A furnace arch cornprising hanger the same. 2. g

furnace, arch -,comprising hanger ,,blocks supported in an upper layer, laterfrom said hanger blocks, supple-" mental underfacing' blocksv and supplemen-i main underfaicing Witnesses;

corner blocks projecting 0nd the innermost of said main ally sipaced main underfacing blocks-and latera y spaced-main corner blocks detachably hung-from said hanger blocks, and

abutting ends of said mainunderfacing and tions. 4

corner blocks, saidv main v 35' er bloc-ks fitting the I 1 space between the projecting upper portions corner blocks and overlying 10. A furnace comprising hanger ally spaced blocks said hanger blocks;

blocks and co-operating'therewith to form the under surface ofthe arch.

-In testimony whereof I aflix my signature in presence of two witnesses. j v

LIPTAK. CLARA I "1 A BERNICE G. BAp'uANmf and other blocks d'e- .tachably g from said second noted 

